Year Percent 1996-01-01 100.0000 1997-01-01 100.0000 1998-01-01 100.0000 1999-01-01 100.0000 2000-01-01 100.0000 2001-01-01 100.0000 2002-01-01 100.0000 2003-01-01 100.0000 2004-01-01 100.0000 2005-01-01 99.7087 2006-01-01 88.2653 2007-01-01 58.8806 2008-01-01 51.9203 2009-01-01 47.8947 2010-01-01 41.9188 2011-01-01 40.0667 2012-01-01 39.0779 2013-01-01 35.7809 2014-01-01 32.5207 2015-01-01 33.5261 2016-01-01 33.3488